Genetic markers and quantitative genetic variation in Medicago truncatula (Leguminosae): a comparative analysis of population structure.
Genetic markers and quantitative genetic variation in Medicago truncatula (Leguminosae): a comparative analysis of population structure.
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蒺藜苜蓿（豆科）的遗传标记和数量遗传变异：种群结构的比较分析。
作者：
Isabelle Bonnin;J. Prosperi;Isabelle Olivieri
一年生自交苜蓿的两个居群。以豆科植物（Leguminoseae）为研究对象，将其分为3个亚群，对其性状（数量性状）和遗传标记（随机扩增多态性DNA和1个形态单位点标记）进行了研究。方差成分的层次分析表明：(1)群体中数量性状的分化程度高于标记位点；(2)亚群体内和亚群体间方差成分对这些性状总体遗传变异的贡献低于标记；(3)在群体水平上，群体结构内标记的差异略大于数量性状，但不显著。在大多数标记是中性的假设下，这种比较可以用来对面对遗传漂变和基因流动的自然选择的强度和异质性做出假设。因此，我们认为在这些种群中，数量性状在种群之间受到强烈的分化选择，基因流动在种群和亚种群之间受到限制。
Two populations of the selfing annual Medicago truncatula Gaertn. (Leguminoseae), each subdivided into three subpopulations, were studied for both metric traits (quantitative characters) and genetic markers (random amplified polymorphic DNA and one morphological, single-locus marker). Hierarchical analyses of variance components show that (1) populations are more differentiated for quantitative characters than for marker loci, (2) the contribution of both within and among subpopulations components of variance to overall genetic variance of these characters is reduced as compared to markers, and (3) at the population level, within population structure is slightly but not significantly larger for markers than for quantitative traits. Under the hypothesis that most markers are neutral, such comparisons may be used to make hypotheses about the strength and heterogeneity of natural selection in the face of genetic drift and gene flow. We thus suggest that in these populations, quantitative characters are under strong divergent selection among populations, and that gene flow is restricted among populations and subpopulations.
果蝇自然群体中 6-磷酸葡萄糖酸脱氢酶基因座 DNA 变异的进化推论：选择和地理分化。
影响因子：
3.3
作者：
Begun,DJ;Aquadro,CF
通讯作者：
Aquadro,CF